Black Canyon of the Gunnison National Park Climbing:

Marmot Rocks: 4 Routes
Located in the Park along the South Rim Drive, between the Painted Wall and Cedar Point Overlooks, on the south side of the road. Parking at the Painted Wall Overlook, hiking along the road until it bends to the right, then a trail to the boulders. The boulders are visible on the south side from the road. At the Visitor Center there is a brochure on bouldering at Marmot Rocks.
Mountainproject.comn: Marmot Rocks BoulderingSouth Rim Rock Climbing: 25 Routes
The South Rim features longer routes with colder temperatures and easier access than the North Rim.
Mountainproject.com: South Rim Routes Rock ClimbingNorth Rim Routes: 91 Routes
North Rim features terrific and terrifying routes of a shorter length with warmer temperatures.
Mountainproject.com: North Rim Routes Rock Climbing